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Addition reaction method for preparing cyclic carbonate from epoxide and carbon dioxide

A technology of epoxy compounds and cyclic carbonates, applied in organic chemistry and other directions, can solve the problem of less research on gold catalysts, and achieve the effects of easy separation, easy purification, and simple catalyst system

Inactive Publication Date: 2007-10-17
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with other noble metals, gold catalysts are relatively less studied in organic reactions.

Method used

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  • Addition reaction method for preparing cyclic carbonate from epoxide and carbon dioxide
  • Addition reaction method for preparing cyclic carbonate from epoxide and carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-14

[0019] Weigh 60 grams of resin with product code number 201×7, add 30 grams of sodium hydroxide, stir at room temperature for 6 hours, filter, dry at 80°C in air for 3 hours, add 60ml of 0.09% aqueous chloroauric acid solution in mass percentage After stirring slowly for 10 hours, dry at 80° C. in air for 3 hours to obtain the required catalyst Au-Na / D201 × 7, the gold mass percentage of the catalyst is 0.05%, and the mass percentage of sodium is 0.05% (implementation example 1).

[0020] Na 2 CO 3 , KOH and K 2 CO 3 One of them replaces NaOH, and all the other are the same as in Example 1 to obtain catalyst Au-Na / 201×7-1, Au-K / 201×7 and Au-K / 201×7-1, and the gold content of the catalyst is respectively 0.04 %, 0.05% and 0.04%, the mass percentage of alkali in the catalyst is respectively 0.02%, 0.03%, 0.05% (embodiment 2-4).

[0021] Replace D201×7 with one of 201×7FC, 201×7SC, 201×7MB, 201×7DL, 201×4, D201, D201FC, D201SC, D201MB and D202, and the rest are the same as i...

Embodiment 15-19

[0023] Add 2 g of Au-Na / 201×7 catalyst into a 1-liter high-pressure reactor equipped with electromagnetic stirring, add 40 ml of propylene oxide, introduce 3 MPa of carbon dioxide, heat the reactor to 120 ° C, and stir for 20 hours. The reactor was cooled to room temperature and the chromatographic yield of propylene carbonate was 81%.

[0024] The catalyst was directly reused 4 times, and the yields of propylene carbonate were 75%, 78%, 76% and 76%, respectively.

Embodiment 20

[0026] Add 2 grams of Au-Na / 201×7 catalyst into a 1-liter high-pressure reactor equipped with electromagnetic stirring, add 40 ml of 1,2-epoxyhexene, introduce 4 MPa of carbon dioxide, and heat the reactor to 100 ° C. The reaction was stirred for 24 hours. The reactor was cooled to room temperature, and the chromatographic yield of 1,2-hexenyl carbonate was 85%.

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Abstract

The invention relates to a method for preparing cyclic carbonates with additive reaction of epoxides and carbon dioxide ring, employing highly basic phenylethene ion exchange resin modified by NaOH,Na2CO3, KOH or K2CO3 or macroporous highly basic phenylethene ion exchange resin as catalyst, with the reaction temperature being 40-200 Deg C, the reaction pressure being 1-60 atm, reaction time being 1-48 hours, to catalyze epoxides and carbon dioxide ring to prepare relevant cyclic carbonates. The method is mainly characterized by the high catalyst activity, simple operation, easy to separate product and recover catalyst which is reusable.

Description

technical field [0001] The invention relates to a method for preparing cyclic carbonate by cycloaddition of epoxy compound and carbon dioxide. Background technique [0002] Cyclic carbonates are high-boiling-point and high-polarity organic solvents with excellent properties, and are widely used in organic synthesis, cosmetics, gas separation, battery dielectrics, and metal extraction. In recent years, many urea manufacturers have used propylene carbonate as a decarburizing agent, which has greatly increased the demand. The synthesis methods of cyclic propylene carbonate mainly include phosgene method, transesterification method and cycloaddition of epoxy compounds and carbon dioxide. Among them, the cycloaddition of cyclic carbonates with epoxy compounds and carbon dioxide as raw materials in the presence of catalysts is a low-pollution, environmentally friendly synthetic route, and its research and development has received widespread attention. The reported catalysts for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D317/34
Inventor 邓友全石峰郭术李冬梅
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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